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CBSE Class 11-science Answered

For hydrogen atom the energy of a photon emitted during a transition from n=2 state to n=1 state is 
Asked by arushidabhade | 08 Jul, 2019, 08:07: PM
answered-by-expert Expert Answer
Given:
 
n1 =1
 
n2 = 2
 
RH = 2.18×10-18 J
 
We have,
 
increment straight E space equals space straight R subscript straight H straight Z squared space open square brackets fraction numerator 1 over denominator straight n subscript 1 superscript 2 end fraction minus fraction numerator 1 over denominator straight n subscript 2 superscript 2 end fraction close square brackets space space space space space space space equals 2.18 cross times 10 to the power of negative 18 end exponent space open square brackets 1 over 1 minus 1 over 2 squared close square brackets space space space space space space equals space 2.18 cross times 10 to the power of negative 18 end exponent cross times open square brackets fraction numerator 4 minus 1 over denominator 4 end fraction close square brackets space space space space space space equals 1.635 space cross times 10 to the power of negative 18 end exponent space straight J
 
 
Answered by Varsha | 09 Jul, 2019, 12:06: PM

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